Jason has over a decade of experience in publishing and has penned thousands of articles during his time at LifeSavvy, Review Geek, How-To Geek, and Lifehacker. Prior to that, he was the Founding Editor of Review Geek. Prior to his current role, Jason spent several years as Editor-in-Chief of LifeSavvy, How-To Geek's sister site focused on tips, tricks, and advice on everything from kitchen gadgets to home improvement. He oversees the day-to-day operations of the site to ensure readers have the most up-to-date information on everything from operating systems to gadgets. If yours doesn't, you can always restart the computer to access BIOS, since the restart cycle will still perform a full shutdown.Jason Fitzpatrick is the Editor-in-Chief of How-To Geek. Some versions of BIOS/UEFI work with a system in hibernation and some do not. When a computer hibernates, it does not enter a fully powered down mode. Depending on your system, you may not be able to access BIOS/UEFI settings when you shut down a computer with Fast Startup enabled.Even worse, if you boot into another OS and then access or change anything on the hard disk (or partition) that the hibernating Windows installation uses, it can cause corruption. If you're dual booting, it's best not to use Fast Startup or Hibernation at all. You won't be able to access it from other operating systems if you have your computer configured to dual-boot. When you shut down a computer with Fast Startup enabled, Windows locks down the Windows hard disk.You'll have to experiment with it to see whether your devices respond well or not. Some devices just don't play well with hibernation. Systems that don't support hibernation won't support Fast Startup either.And BitLocker users shouldn't be affected.) (This doesn't affect the full disk encryption feature of TrueCrypt, just disk images. The solution for this is just to manually dismount your encrypted drives before shutting down, but it is something to be aware of. Users of encryption programs like TrueCrypt have reported that encrypted drives they had mounted before shutting down their system were automatically remounted when starting back up. Fast Startup can interfere slightly with encrypted disk images.If a shutdown doesn't apply your updates, a restart still will. Restart is unaffected, though, so it still performs a full cold shutdown and restart of your system. Since applying new system updates often requires a shutdown, you may not be able to apply updates and turn your computer off. When Fast Startup is enabled, your computer doesn't perform a regular shut down.But Fast Startup also has its problems, so you should take the following caveats into consideration before enabling it: Why You Might Want to Disable Fast Startup This technique can shave considerable time off your start up. Instead, it just refreshes your RAM with the loaded image from the hibernation file and delivers you to the login screen. When you start the computer again, Windows does not have to reload the kernel, drivers, and system state individually. Windows then alerts device drivers that support it to prepare for hibernation, saves the current system state to the hibernation file, and turns off the computer. At this point, Windows is in a state very similar to when it's freshly booted up: No users have logged in and started programs, but the Windows kernel is loaded and the system session is running. When you shut down your computer with Fast Startup enabled, Windows closes all applications and logs off all users, just as in a normal cold shutdown. How Fast Startup Worksįast Startup combines elements of a cold shutdown and the hibernate feature. Fast Startup is enabled by default in a clean Windows installation on most laptops and some desktops, but it doesn't always work perfectly, and there are some downsides that might convince you to turn it off.

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